WHOLE OR HALF?

[Blackdiamond]

Hey yall--I have been trying to get a correct answer to this question: When a man fathers a child by two different women, are those children half brothers and sisters? I've always believed that if a child have the same Father, they are whole. The majority of people I've talked to, especially MY FOLKS, says if a woman has a child by two different men, they are whole brothers or sister. HELP! (I'd also appreciate some references to back up your answer.)